Chemical lab escape tunnel blocked?

[unknown]

Hello,

I've encountered what I think may be a bug. When trying to leave the chemical lab after getting Substance 65, I enter the emergency tunnel when the countdown begins. However, after the 2nd right turn there is a solid wall of debris.

I can't seem to move it or get around it in any way. The walkthroughs I've seen online don't seem to indicate this difficulty.

Is this a puzzle I'm missing the solution to or is it a glitch? If a glitch, is there an easy way to resolve it?

Thanks

P.S. both Overture and Black Plague have been great; looking forward the next one.

[unknown]

Since I found a workaround for this problem, I'll answer my own question:

(Note this is similar to the workaround for the machine room airlock bug discussed in thread http://www.frictionalgames.com/forum/sho...p?tid=2208)
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Go to ~/Library/Preferences/Frictional Games/Penumbra/Black Plague/ and find a saved game file in one of the subfolders. It should be a saved game from somewhere in the chemical lab level.

Open the save file with a text editor and search for "cavein02". Two lines above should be this line:

<var type="1" name="mbActive" val="true" />

Change "true" to "false"

Then read down about 22 lines below the "cavein02" line till you find these lines:

<class type="cEngineBody_SaveData" name="">
<var type="3" name="mfMass" val="0.000000" />
<var type="1" name="mbActive" val="true" />
<var type="1" name="mbCollideCharacter" val="true" />

Change both "true" values to "false".

Next search the file for "cavein03" and make the same set of changes as you did for "cavein02".

Save the file; start the game and load the save game file you just modified. The blockages in the escape tunnel should not appear allowing you to pass through the tunnel and continue the game normally.

BE SURE to keep a copy of the original save game file in case you mess up when editing it. If you make the wrong changes to the save file, it can crash the game when trying to load the save file. Just go back to the unmodified file if that happens and try again.

I hope this helps anyone who ran into this problem as well. Good luck.

P.S. The site http://mod.frictionalgames.com/ and forum thread http://www.frictionalgames.com/forum/sho...p?tid=1176 have useful information for anyone wanting to make modifications to the save files or game.